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Academic Earth | Online Courses | Academic Video Lectures Academic Earth believes everyone deserves access to a world-class education, which is why we continue to offer a comprehensive collection of free online college courses from the world's top universities. And now, we take learning outside the classroom with our original series of thought-provoking videos, designed to spark your intellectual curiosity and start a conversation. Watch, learn, share, debate. After all, only through questioning the world around us, can we come to better understand it.

Academic Earth | Online Courses | Academic Video Lectures

hear you are --- [murmur] Toronto
Soundmap of London canals and minor rivers
EDU

EDU

MIT Understanding Lasers and Fiberoptics full course by MIT Lasers are essential to an incredibly large number of applications. Today, they are used in bar code readers, compact discs, medicine, communications, sensors, materials processing, computer printers, data processing, 3D-imaging, spectroscopy, navigation, non-destructive testing, chemical processing, color copiers, laser "shows", and in the military. There is hardly a field untouched by the laser. But what exactly is so unique about lasers that makes them so effective?
Melinda Gates and Bill Gates Why giving away our wealth has been the most satisfying thing we've done In 1993, Bill and Melinda Gates—then engaged—took a walk on a beach in Zanzibar, and made a bold decision on how they would make sure that their wealth from Microsoft went back into society. In a conversation with Chris Anderson, the couple talks about their work at the Bill & Melinda Gates Foundation, as well as about their marriage, their children, their failures and the satisfaction of giving most of their wealth away. TED: Ideas worth spreading

TED: Ideas worth spreading

Big Think | Blogs, Articles and Videos from the World's Top Thinkers and Leaders

Today’s Big Idea What's the secret to good health? It's no longer a secret, and it's actually fairly simple, even as good health is something that is very hard to achieve in our …society today. According to Dr. H. Big Think | Blogs, Articles and Videos from the World's Top Thinkers and Leaders